The National Park Service is celebrating the 50th anniversary of the closing of Alcatraz Island as a federal penitentiary with a new photo exhibit. The striking images were taken by Los Angeles-based freelance photographer Leigh Wiener for Life Magazine on March 21, 1963, the day the infamous prison in San Francisco Bay was closed after holding the likes of gangsters Al Capone and Mickey Cohen. Alcatraz started as a fort before becoming an Army disciplinary barracks. The Bureau of Prisons took it over in 1934. The exhibit is expected to be on view for at least three months.